¡ Semiconductor
ML63187/63189B
• Stack level
Call stack level
Register stack level
: 16 levels
: 16 levels
• I/O ports
Input ports: Selectable as input with pull-up resistor/input with pull-down resistor/high-
impedance input
Input-output ports: Selectableasinputwithpull-upresistor/inputwithpull-downresistor/
high-impedance input
Selectable as P-channel open drain output/N-channel open drain
output/CMOS output/high-impedance output
Canbeinterfacedwithexternalperipheralsthatuseadifferentpowersupplythanthisdevice
uses.
Number of ports:
ML63187
Input-output port
ML63189B
: 2 ports ¥ 4 bits
Input port
Input-output port
: 1 port ¥ 4 bits
: 4 ports ¥ 4 bits
• Melody output
Melody frequency
Tone length
: 529 to 2979 Hz
: 63 types
Tempo
: 15 types
Melody data
Buzzer driver signal output
: Resides in the program memory
: 4 kHz
• LCD driver
Number of segments
1/1 to 1/16 duty
: 1024 Max. (64 SEG ¥ 16 COM)
1/4 or 1/5 bias (regulator built-in)
Selectable as all-ON mode/all-OFF mode/power down mode/normal display mode
Adjustable contrast
• Reset function
Reset through RESET pin
Power-on reset
Reset by low-speed oscillation halt
• Battery check
Low-voltage supply check
The value of the judgment voltage is selected by the software by setting the LD1 and LD0 bits
of BLDCON.
LD1
LD0
Judgment Voltage (V)
1.05 0.10
Remarks
Ta = 25°C
Ta = 25°C
Ta = 25°C
Ta = 25°C
0
0
1
1
0
1
0
1
1.20 0.10
1.80 0.10
2.40 0.10
2/35
OKI [ OKI ELECTRONIC COMPONETS ]
